git: kernel - Fix AHCI callout timer race

[Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxxxxx>]

commit bb79834d4440c42ded824722460ae008a58ecf26
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date:   Fri Jan 20 10:20:20 2012 -0800

    kernel - Fix AHCI callout timer race
    
    * callout_stop_sync() can block.  If this occurs a race can cause a
      CCB to be processed for completion twice.
    
    * Add a serial number to detect this situation.
    
    Reported-by: "G. Isenmann via Redmine"

Summary of changes:
 sys/dev/disk/ahci/ahci.c    |   31 ++++++++++++++++++++++++++++---
 sys/dev/disk/ahci/atascsi.h |    1 +
 2 files changed, 29 insertions(+), 3 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/bb79834d4440c42ded824722460ae008a58ecf26


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